This fix is a follow up to #29365. In #29365 a bug was fixed for
`docker exec -u user` after live restore by remounting.
However, #29365 will prevent containers from restored if mount failed.
In this fix, containers will be restored even if mount in that step failed.
Some functionalities might be missing (like `docker exec -u user`) but
at least it is possible to do certain operations like stop/restart/delete.
This fix is related to #29365.
Signed-off-by: Yong Tang <yong.tang.github@outlook.com>
Upstream-commit: 3003ae1d8bd112e78bcc8c1c70efd9d3ef6f0ddc
Component: engine
7b8a80a706